说明：  采用TCC平台，讲述如何开发视频通话的功能，基于IP的传输方式，本文档重在讲解原理。很好的参考，包括如何在android系统下面移植硬件编解码库
(The use of TCC platform, how to develop video call function, IP-based transmission, this document focuses on explaining the principle. Good reference, including how the android system hardware codec library following transplantation)